A two-minute estimate

When will you
die?

Built on 14,000 longitudinal studies. Estimate the years you have left from sleep, stress, fitness, and the honest stuff you do every day.

1,486,802,400seconds the world spent dying while you read this
Joined by 2,418,022 people·No account · 2 min · Private
Sleep
6.1h
−4.2y
Cardio · top 18%
142bpm peak
+2.1y
Stress
high
−1.8y
whenwillidie
Your estimate
81
years
47y 3m 11d from today
87% confidence73rd percentile
Trajectoryvs avg · 76
Sleep
6.1h · below need
−4.2y
Cardio
top 18%
+2.1y
Stress
high · 6 of 10
−1.8y
0
Predictions generated
0+
Longitudinal studies
0M
Views on TikTok
0%
Model confidence
The internet reacts

4.2 million people
have seen their number.

Screenshots from TikTok, X, and Threads. Names changed, vibes preserved.

m
@mayaiscold
on TikTok · 2.3M views
"i was NOT ready to see 62. opened the app at 11pm and now i'm doing pushups at midnight"
j
jordan k.
on X · @jordan_k
"Spent two minutes on this app and now I'm rethinking my entire relationship with sleep. The −4 years for 6 hours hit different."
a
@_atlas.runs
on Instagram · story
"got 91 years. putting it in my bio. cope harder, doomers."
How it works

Three steps. Two minutes.
One uncomfortable answer.

step 01
Answer the honest stuff.

18 questions about your sleep, stress, movement, food, vices. No medical jargon. Two minutes.

step 02
The model reads you.

Your answers cross-referenced against 14,000 longitudinal studies and 12M anonymized profiles.

step 03
Your number, revealed.

One number. The biggest forces shortening or extending your life — ranked, with the years they cost or save.

What you'll see

A premium read on the
life you're actually living.

Biological age

You're 28 on the calendar.
34 in your veins.

28 cal34 bio

Biomarker age estimate from sleep architecture, recovery, HRV trends and inflammatory load proxies.

Lifespan estimate

A single number.
Tabular, unflinching.

81
years
47y 3m 11d remaining

Counted in years, months, days. Updated every time you retake the quiz or sync new vitals.

Longevity score

Where you rank
against everyone else.

7373rd percentile

One scrollable score — 0–100 — calibrated against your age cohort. Track it weekly.

Risk factors

Exactly which habits are costing you years.

Sleep deficit−4.2y
Chronic stress−1.8y
Sedentary blocks−1.1y

Ranked by years-cost. Not opinions — model-weighted, sourced.

AI insights

Plain-language reads on the data behind your number.

"Your body is keeping score on Sunday nights. Three weeks running, you slept under 6h on Sundays — that one habit alone is worth almost a year."

Editorial-quality summaries. Built by a model trained to write like a careful, kind clinician.

Years you can gain back

The good news, in +years.

+7.4
years
with your top 3 protocols

Personalized protocols ranked by how many years each could realistically return.

Inside the app

A two-minute
cinematic experience.

From question one to the moment the orb finally stops spinning — designed to feel like a film about you.

whenwillidie
04 / 18
Sleep
How many hours do you sleep on a typical night?
Less than 5 hours
5 – 6 hours
6 – 7 hours
7 – 8 hours
More than 8
Continue →
01 · QUESTIONS
Onboarding
whenwillidie
· · ·
73%
AI · calibrating
Crossing 14,000 longitudinal studies…
Estimates are statistical, not predictive.
02 · LOADING
Cinematic analysis
whenwillidie
Your estimate
81
years
47y 3m 11d from today
87% confidence73rd percentile
Trajectoryvs avg · 76
Sleep
6.1h · below need
−4.2y
Cardio
top 18%
+2.1y
Stress
high · 6 of 10
−1.8y
03 · RESULTS
Your dashboard
whenwillidie
PRO
See what you can buy back.
Personalized longevity protocols, weekly check-ins.
You could gain back
+7.4
years
With your top 3 protocols
Personalized longevity protocols
Weekly biological-age recalibration
Risk modeling on 200+ factors
AI longevity coach (in chat)
Unlock Pro · $9/mo
04 · PRO
Premium report
Pro

See what you can buy back.

The full report. Personalized longevity protocols. Weekly recalibration. The version that helps you actually move the number.

  • Personalized longevity protocols, ranked by years recoverable
  • Weekly biological-age recalibration & trend lines
  • Risk modeling on 200+ lifestyle and biomarker factors
  • AI longevity coach — chat any time, get clinical-grade reads
  • Apple Health · Whoop · Oura sync, automatic
$9/mo
Cancel any time · 7-day free trial
Start free trial
whenwillidie
PRO
See what you can buy back.
Personalized longevity protocols, weekly check-ins.
You could gain back
+7.4
years
With your top 3 protocols
Personalized longevity protocols
Weekly biological-age recalibration
Risk modeling on 200+ factors
AI longevity coach (in chat)
Unlock Pro · $9/mo
One question

Your future may
already be written.

Two minutes. No account. No email. Just the honest stuff.

Start my prediction
Estimates are statistical, not predictive. This isn't a diagnosis.